﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Zhaoxi.CSharpDemo.CSharp10
{
    public class UserInfo
    { 
        public int UserId { get; set; } 
        public string? UserName { get; set; } 
        public int Age { get; set; } 
        public Address? Address { get; set; }
    }


    public class Address
    {
        public string? City { get; set; }
    }
}
